Oracle - Efficient 1Z0-171 New Exam Materials

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Oracle 1Z0-171 Exam Syllabus Topics:

Section	Objectives
Relational Database Concepts	- Database fundamentals and relational model 1. Entity relationships and normalization basics 2. Tables, rows, columns, and keys
Retrieving Data Using SQL	- Joins and Subqueries 1. Correlated and non-correlated subqueries 2. Inner and outer joins - SELECT statements 1. Sorting results with ORDER BY 2. Column selection and expressions 3. Filtering with WHERE clause
Data Definition Language (DDL)	- Schema objects 1. Tables and constraints 2. Views and indexes
Advanced SQL Features	- Aggregations and grouping 1. GROUP BY and HAVING 2. Aggregate functions - Set operators and functions 1. UNION, INTERSECT, MINUS 2. Single-row and group functions
Data Manipulation Language (DML)	- Insert, Update, Delete operations 1. Data integrity considerations 2. Transaction control (COMMIT, ROLLBACK)

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Oracle Database 23ai SQL Associate Sample Questions (Q85-Q90):

NEW QUESTION # 85
Which command would drop an index from a table?

A. REMOVE INDEX
B. TRUNCATE INDEX
C. DELETE INDEX
D. DROP INDEX

Answer: D

NEW QUESTION # 86
What happens when a unique index is created on a table column?

A. The column data type is converted to a primary key.
B. The column can only contain NULL values.
C. The column cannot contain duplicate values.
D. The column values are automatically encrypted.

Answer: C

NEW QUESTION # 87
How can a synonym benefit database design?

A. It enforces constraints on table columns.
B. It improves query execution time.
C. It allows the renaming of columns in a table.
D. It provides a consistent reference to database objects, even if their underlying names change.

Answer: D

NEW QUESTION # 88
Which clause is used to ensure that only specific rows are deleted in a DELETE statement?

A. HAVING
B. FROM
C. WHERE
D. SET

Answer: C

NEW QUESTION # 89
What does the following SQL statement do?
CREATE TABLE employees (
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(50),
hire_date DATE NOT NULL
);

A. Creates a temporary table
B. Creates a table with a primary key and a NOT NULL constraint
C. Creates a table with only VARCHAR2 and DATE columns
D. Creates a table with no constraints

Answer: B

NEW QUESTION # 90
......

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